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This paper introduces an abstract model for mechanisms for the governance of large, heterogeneous, and open networked systems. This, so called Interaction Control (IC), model goes well beyond conventional access control, along a number of dimensions. In Particular, the IC model is inherently decentralized, and thus scalable even for wide range of stateful policies, is very general, and not biased toward any particular type of policies; thus providing a significant realization of the age-old principle of separation of policy from mechanism; and enables flexible, composition-free, interoperability between different policies.
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